#10 Emerald / Ruby Weapon (FFVII)
Sure, those were the hardest optional boss fights I had ever done as a kid. Quite possibly the only really good hard hidden boss fights I could remember from back then too. But they definitely deserve a mention. I hate to say it, because this game was so amazing, but if you played, and beat FFVII, as many times as I did, with as many different combinations of sneaky tactics (7777), and (4-x Cut) (Phoenix - Final Attack) then you know you just simply had too many options to be "overly" amazing in those fights. I would love to see a remake of FFVII (only with better graphics, keep everything else the same, and add a few more challenging fights) They might want to take out the W-Item glitch though, 99 megalixers makes things wayyyy too easy.
Plus Vincents Death Warrant, and Cait Sith's Limit Break Death, too many cheap alternatives.
#09 Ragu-o-Ragula (Wild Arms)
This was an epic fight, which required many sacrificial goat accessories (I can't remember the actual name of them) but again, Wild Arms was just too "sneaky" with the apple trick. You could save a few apples that would increase your stats (atk, mag, etc), and continue a glitch that would allow you to become a god, maxing out everything. Now if you didn't cheat, (and you were even able to find Ragu-o-Ragula) punch the teleport box, and eventually find your way into the annoying dark dungeon, then you were in for a battle of epic proportions, but since you can cheat, its just not cool.
#08 Omega Weapon (FFVIII)
I loved how complicated it was to get to Omega Weapon, but again, here is an instance of where your characters can just become far too godly for this battle to even matter much. All I have to say is, when you go through the trouble of modding 100 Ultima Magics to your defense, you can't die. Except for the ultra cheap move that takes 9999 away from you multiple times, but all you really need to do to avoid that is to turn your card into 99 megalixers and, thusly, you can never die. It was still a bit challenging, but just left something to be desired.
#07 Freya (Star Ocean 3)
Now, this fight was one I had to think about over and over again, make multitudes of cheap items for preparation, require countless amounts of different strategies, etc. But when it all comes down to it, it was a hard fight even though there were tons of cheap things you could do to win it. You could use Maria, and go for the MP kill, which I found to be easiest, (don't forget those stun bombs) Or you could actually try and kill her without the cheapness, and if you did, you would find that Niebulung Valesti was an ass raping to be seen by none other. It was definitely a great fight, but amazingly enough you could do the cheapest things to get through it. Heres a vid without the cheapness
#06 Sekundes (Tales of Destiny II)
Wowza, if you have ever had the glory of fighting this optional Craymel, you would know what im takling about, its just ridiculous. Because of how tedious it was to level up, but you could always go to the arena and get some red sage to buff your HP. You have to do it on the hardest difficulty for it to count though, and in this game getting through the first dungeon on that difficulty is damn near impossible, tediousness is a must have for this one
#05 Shin Megami Tensei: Digital Devil Saga
The main Char from Nocturne, but there were a couple good cheap ways to take him out, if you played this on expert, regardless of cheapness he was still a hard bastard. He kept summoning demons, and had attacks that could wipe your party out like it was no big deal. But he had a glitch you could use against him to barely make it out alive, which was almost necessary in order to survive
#04 Sephiroth (Kingdom hearts 1)
I thought sephiroth in KH 1 was a lot harder than he was in KH 2 Just when you thought you were down to the last bar, he would do bullshit and kill your ass.
It was very hard, if you didn't do it, you don't know, when this game is on hard, its just that, hard you had to level up drastically and get new tactics on every boss, Ursula, and Maleficent killed me multiple times, Sephiroth killed me hundereds. Thank god for continue.
#03 Parasite Eve .... Maya
If you got through the random 100 level dungeon, (probably by your third time playing the game) you would still get your ass kicked, it required beating the game several times to get strong enough to kill her, this battle was simply amazing, one of the hardest bosses I have ever killed. Especially since leveling after 50 was damn near impossible
#02 Shin megami Tensei Nocturne Lucifer
If you spent 150 hours leveling and fusing, and fighting all the hardest bosses in the game, at the right times, in the hardest difficulty, you got to fight this fucker in order to see the true ending
#01 Sin Megami Tensei Persona 3 Elizabeth
Impossible unless you beat the game 2-3 times, took 100 hours plus to prepare, and you can't save before you fight her, you have to run through a random dungeon, and when you get to her, if you have the wrong persona attached, she will instantly kill you
This is ranked my #1, because I never actually killed the bitch, I got tired of running down the stairs over and over and over
you also HAD to fight her alone, or she wouldnt come.
and got 2 turns for your every one.
If you have any other ideas for good bosses I may not have come across let me know :)